Sewing machine



FIG. 1 is a front elevational view of a sewing machine showing mydesign;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right-end elevational view thereof;

FIG. 4 is a left-end elevational thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

The ornamental design for a sewing machine, substantially as shown.